KR20160048805A - Computer-implemented dental restoration design - Google Patents

Abstract

A computer implemented method of designing a system and a dental restoration for performing the described method is provided. In one embodiment, the method includes providing at least a portion of a virtual three-dimensional representation of a patient's dentition including at least one prepared tooth, identifying a preparation margin on a virtual three-dimensional representation, To a straight line with a virtual three-dimensional representation, and suggesting an initial restoration design based on the tooth design obtained from the virtual tooth library.

Description

COMPUTER-IMPLEMENTED DENTAL RESTORATION DESIGN [0002]

Cross-references to related applications

This application claims the benefit of U. S. Provisional Application, filed August 26, 2013. Provisional Application Serial No. 61 / 869,922, filed Aug. 26, 2014; Priority is claimed to application Serial No. 14 / 468,946, the entire contents of which are incorporated herein by reference.

background

CAD / CAM dentistry (computer-assisted design and computer-assisted manufacturing in dentistry) provides a variety of dental restorations, including dental tubes, veneers, inlays and onlays, fixed bridges, dental implant restorations, It is the field of dentistry using CAD or CAM technology. Although CAD / CAM dentistry was rapidly used in the mid-1980s, initial efforts were considered novel but cumbersome, requiring an excessive amount of time to produce viable products. This inefficiency hinders its use within the dental clinic and is limited to large dental laboratories. As additional technology, software, and materials have improved, CAD / CAM usage has increased in dental labs and dental procedures. Advances in tooth restoration techniques also include the use of imaging techniques, including intraoral imaging techniques, and the integration of digital or computer-controlled components as opposed to mechanical or electrical alone techniques.

CAD / CAM restorations beside "patient's chair" are different from traditional dentistry in that prostheses are typically encapsulated or bonded to the same. A traditional prosthesis, for example, a dental cannula, is placed in temporary teeth for one to several weeks while the dental laboratory room or the in-place tooth wrap produces the restoration. The patient removes the temporary tooth, and then returns to bond or bond the cavity-made tooth tube with cement. Advances in software and in-house CAD / CAM systems provide efficiency and allow the laboratory and dentist to create completed inlays in less than an hour, in some cases. CAD / CAM restorations are also typically more conservative in tooth preparation. Care should be taken not to remove the enamel layer because the bond is more effective on the tooth enamel than on the underlying dentin.

In a typical CAD / CAM dental procedure, the prepared tooth is first taken and stored as a three-dimensional digital model, and then the software is used to approximate the restoration shape using the comparison to the surrounding teeth. The physician then uses the 3D CAD software to refine the model. When the design time is complete, information is sent to the milling unit, which mills the actual restoration from the solid block of material using one or more machine tools. The restoration is bonded to the tooth using cement or other adhesive that bonds to both the restoration as well as the tooth itself.

The treating dentist prepares a tooth to be restored as a dental tube, inlay, onlay, or veneer. In some cases, the teeth are then powder sprayed with a thin layer of antireflective contrast agent. The prepared tooth and its surroundings are then imaged by a 3D imaging camera and updated on the computer. Alternatively, an impression is formed that is formed into a model that is directly scanned or injected, and which can then be updated on the computer by the dentist or dental lab. With software, the restoration can be designed to restore the tooth in its proper form and function. In this restoration, this data is stored in a file and sent to the milling machine. The restoration can then be milled from a solid ceramic, glass, glass-ceramic, or composite block. The milling time may vary from a few minutes to a half hour or more, depending on the complexity of the restoration and the version of the milling unit.

A commercially available box or model scanner, for example, a scanner provided by 3Shape, can be used to inject a model of a patient's dentition by a dentist or dental lab. In addition, FastScan® (IOS Technologies, Inc.), CEREC® (Sirona), E4D (D4D Technologies), True Definition Scanner (3M ESPE), Trios® (3Shape), and iTero (Cadent / Align Technology, Inc.) , As well as several on-premises video technologies and products available today. These in-room scanners provide accurate acquisition of patient oral condition image information from the dental chair and delivery thereof to the chamber or to the side branch of the patient's chair.

summary

The following describes a computer implemented method of designing a dental restoration and system to perform the method described.

According to a first aspect of the systems and methods described herein, there is provided a computer implemented method of designing a dental restoration for a patient, wherein the method comprises at least some of the dentition of a patient comprising at least one preparation tooth Providing a three-dimensional representation of Checking the preparation margin on a virtual three-dimensional representation; Placing an arch shape of a virtual tooth library in a straight line with a virtual three-dimensional representation; And suggesting an initial restoration design based on tooth designs obtained from virtual tooth libraries. In some instances of the first aspect, the method of designing a dental restoration further includes modifying the initial restoration design to obtain a final restoration design. In another example of the first aspect, the method of designing a dental restoration further includes using a final restoration design to produce a final restoration.

According to another aspect of the systems and methods described herein, there is provided a non-transitory computer readable medium storing a program that causes a computer to implement a tooth restoration design process, wherein the tooth restoration design process comprises at least one preparation tooth Providing a virtual three-dimensional representation of at least some of the patient ' s dentition comprising; Checking the preparation margin on a virtual three-dimensional representation; Placing an arch shape of a virtual tooth library in a straight line with a virtual three-dimensional representation; And suggesting an initial restoration design based on tooth designs obtained from virtual tooth libraries. In some instances of the first aspect, the method of designing a dental restoration further includes modifying the initial restoration design to obtain a final restoration design. In another example of the first aspect, the method of designing a dental restoration further includes using a final restoration design to produce a final restoration.

Brief Description of Drawings
1 is a front view of a specific example of an intraoral injection system.
Figures 2a and 2b are cross-sectional side views of a prepared tooth illustrating a two-string retraction technique.
FIG. 3 is an illustration of a visual representation of a prepared three-dimensional model of a prepared tooth, its surroundings, and a counterpart tooth.
Figure 4 is a block diagram of an embodiment of a tooth restoration design system.
Figures 5a, 5b, 5c, and 5d are examples of visual representations of the virtual three-dimensional model of Figure 3, illustrating marginal lining processes.
Figures 6a, 6b and 6c are illustrations of a representation of a virtual three-dimensional model of a patient's dentition and an example of an offset surface component.
Figures 7a and 7b are examples of a virtual three-dimensional representation of the patient's dentition and offset surface components.
Figures 8a, 8b and 8c are representations of a hypothetical reduced coping model.
9a is a top view of a virtual three-dimensional model of a tooth library.
9b is a perspective view of teeth of the tooth library of Fig. 9a. Fig.
Figures 9c and 9d are examples of visual representations of the steps involved in arranging and aligning a tooth library in a virtual three-dimensional model of the prepared teeth and surrounding teeth.
Figures 10 and 11 are visual representations of an example of steps in the process of aligning the library tooth to a virtual model of the prepared teeth and surrounding teeth.
Figure 12 is a workflow diagram of one embodiment of a computer-implemented automated process for designing a dental restoration.
Figure 13a is a representation of an injected model of the upper and lower jaws of a patient with a peak identified.
Figure 13b is a visual representation of an example of a step for arc fits in the injected model.
Figures 13c, 13d, 13e, 13f and 13g are visual representations of an example of the step of placing and registering the injected model and library arch shape of the patient's dentition.
Figures 14a and 14b are a visual representation of an illustrative example of steps for registering an injected model and library arch shape of a patient's dentition.
Figures 15-16 are an illustration of the visual representation of the steps involved in the process of designing the restoration.
Figures 17a and 17b are examples of visual representations of Edit Contacts features provided with a tooth restoration design program.
Figures 18-19 are examples of visual representations of restorations designed by a tooth restoration design program.
20 is a perspective view of a restorative branch suitable for machining a dental restoration.
Although the above identified figures illustrate currently disclosed embodiments, as is known in the detailed description, other embodiments are also contemplated. The present invention provides illustrative embodiments as representative, not limiting. Various other modifications and embodiments may be devised by those skilled in the art that fall within the scope and spirit of the principles of the invention.

details

Exemplary embodiments of a method and system for designing a dental restoration are provided. The computer implemented method of designing the dental restoration described herein utilizes at least some of the electronic images of the patient's oral environment as a starting point for the design process. Using an electronic image, a computer implemented tooth restoration design system is used to design a suitable tooth restoration and provide instructions to a restoration processing machine, e.g., a mill. The processing machine is then used to produce a dental restoration, which can then be placed into the patient's mouth by the dentist.

The initial step for the computer-implemented method described herein is to provide at least a portion of the electronic image of the patient's oral condition. In some embodiments, the electronic image is acquired by direct intraoral injection of the patient ' s teeth. This typically occurs, for example, in a dental clinic or clinic, and will be performed by a dentist or dental technician. In another embodiment, the electronic image is acquired indirectly by injecting an impression of the patient ' s teeth, by injecting a physical model of the patient ' s teeth, or by other methods known to those skilled in the art. This will typically occur, for example, in the dental laboratory and will be performed by the laboratory technician. Thus, the methods described herein are suitable and applicable for use in patient chairs, dental labs, or other environments.

In a laboratory environment, an electronic image is typically obtained by scanning the physical impression of the patient's tooth, or by, for example, scanning a physical model of the patient's tooth prepared from a physical impression. The details of these processes are beyond the scope of the present disclosure and will be understood by the average person skilled in the art of tooth restoration design and manufacture.

For application by the patient's chair, there are several systems and methods for obtaining electronic image information from the patient. A typical system includes an intra-site scanning system. A number of in-house imaging technologies and products available today, including CEREC® (Sirona), E4D (D4D Technologies), True Definition Scanner (3M ESPE), Trios® (3Shape), and iTero ™ (Cadent / Align Technology, Inc.) . A preferred intra-site scanning system is the FastScan® intra-site scanning system manufactured by IOS Technologies, Inc. of San Diego, California.

1 shows an embodiment of an intraoral injection system 100 suitable for use in a method for designing a dental restoration as described herein. The illustrated intra-city scanning system 100 includes a basic unit 101 serving as a housing for a user interface in the form of a microprocessor or computer 102, a scanning device 103, and a touch screen 104. In the illustrated embodiment, the system 100 also includes a user input device in the form of a stylus 105 that interfaces with a touch screen 104 that allows a user to interact with the system 100. Additional features shown in the embodiment of FIG. 1 include an installation 106 located on the upper surface of the basic unit 101 for storage of the injection device 103, a wheel 107 allowing the basic unit to be easily moved by the user, and any optional disinfectant container 108 .

The scanning device 103 includes a working rod 109 with a probe having a profile and a size that provides a sufficient clinical access to obtain a suitable intraoral image of the patient ' s oral condition, with little or no discomfort to the patient. The work rod 109 is connected to the computer 102 by a strap 110.

Once the patient's teeth are ready, a digital impression of the prepared jaw is obtained using the scanning system 100. In one embodiment, the prepared tooth is suitably isolated from the surrounding gingiva using a two-string retraction technique, as shown in Figures 2a-b. Proper isolation of the prepared tooth from the surrounding gingiva can help to obtain a clearer shot of the preparation margin. In FIG. 2a, two gingival recesses 201, 202 were inserted between the patient's prepared tooth 203 and the peripheral gingiva 204. As shown in FIG. 2b, just prior to injection, the upper recoil string 201 is removed to provide the highest recoil, and the lower recoil string 202 is left in place to control bleeding. In some embodiments, intra-oral spray is used to coat prepared teeth and adjacent and opposed teeth prior to injection.

In one embodiment, a plurality of scans (e.g., three to five scans per quadrant) are performed to obtain an appropriate image of the patient's anatomy. For example, occlusion, lingual, and buccal injection of both the preparation jaw and the opposite jaw may be taken. Thereafter, a single injection of the jaw in the occlusal state can be taken from the buccal viewpoint to establish a proper occlusal relationship between the preparation jaw and the opposing jaw. Additionally, in some embodiments, an adjacent scan is added to capture a contact area of an adjacent tooth.

Further details regarding the scanning device 103 and its method of use are beyond the scope of the present invention, and for this reason, are not described in detail herein. Once the scanning process is complete, the scanning system 100 will, for example, collect a plurality of scans into a digital model of the prepared tooth and its periphery and the opposed tooth, as shown at 300 in FIG. In the illustrated embodiment, the shots of the preparation jaw 301 and the counter jaw 302 are shown in the first indication (e.g., in the first color) and the bite scan is shown in the second indication (e.g., in the second color) Lt; / RTI > The byte scan must be registered and duplicated in the scan of the preparation jaw 301 and the counter jaw 302, as shown in FIG. If so, the model is of a suitable form and is suitable for use in designing restorations used in prepared teeth, as seen in 304 in FIG. 3.

Referring now to Figure 4, a simplified block diagram of an embodiment of a dental restoration design system 400 is described. System 400 typically includes a computer 401, which may include a microprocessor, an integrated circuit, or other suitable computing device. The computer 401 typically includes a processor 402, a memory 403, and a network or communication interface 404. Processor 402 communicates with a number of peripherals including memory 403 and communication interface 404. Communication interface 404 provides the ability to transmit information via a communications network or other data processing system. The input interface or module 405 is electronically coupled to the computer 401. Input interface 405 may include keyboard, mouse, touch screen, stylus pad, foot pedal, joystick, or other suitable user input interface. Other types of user interface input devices, such as voice recognition systems, may also be used. A user interface output device, for example, a monitor 406, is also provided. The interface output device may also include a printer and a display subsystem, which includes a display control device and a display device associated with the control device. The display device may be a cathode ray tube (CRT), a flat panel device such as a liquid crystal display (LCD), or a projection device. The display subsystem may also provide non-visual display, e.g., audio output.

The memory 403 maintains basic programming, instructions, and other software that provides the functionality of the system 400. Memory 403 typically includes a number of memories, including a main random access memory (RAM) for storing instructions and data during program execution, and a read only memory (ROM) in which fixed instructions are stored. The file storage subsystem can provide persistent (non-volatile) storage of programs and data files, and typically includes at least one hard disk drive and at least one floppy disk drive (having associated removable media). There may also be other devices, such as CD ROM drives and optical drives (both of which have their associated removable media). Additionally, such a system may include a type of drive having a removable media cartridge. The removable media cartridge may be, by way of example, a hard drive cartridge or a flexible disk cartridge. One or more of these drives may be located in a remote location, e.g., on a server over a local area network, in a cloud data center, or anywhere on the World Wide Web of the Internet.

Data is transmitted from the intraoral injection system 100 to the dental restoration system computer 401 in the form of a patient record 407. In some embodiments, the patient record 407 includes identification information and an electronic model of the patient's dentition, as described above. Once the restoration is designed, the data in the form of the electronic record 408, including the restoration design, is transferred to the processing system, e.g., the branch, as described more fully below.

Lining of margins to design and process restorative materials

Referring now to Figures 5a-5d, a method for designing a dental restoration is performed using a computer program maintained on the design system 400 described above. A monitor 406 or other screen is used to overview the user interface of the program, and the input interface 405 is used to select commands that perform commands, for example, and to modify features displayed on the monitor 406. In the following description, the operation of a virtual tooth model using a computer mouse as the input interface 405 will be described. It should be understood that other input interface 405 devices may be used in alternative embodiments of the described systems and methods. The program performs a calculation or displays a change on the monitor 406 corresponding to a command issued by the user.

In the first step of the method, shown in FIG. 5a, a scanned model 500 of a patient record is provided on a monitor 406. The injected model 500 includes a virtual representation of the prepared tooth 504, surrounding gingiva, adjacent teeth, and opponent teeth. The prepared tooth margin 501 is identified on the model. Scrolling the center mouse wheel zooms in and out of model 500. By placing the indicator on a particular area of the model and scrolling, the area can be enlarged. Pressing the mouse wheel and moving the mouse will rotate the model 500 around the indicator position. Pressing the right mouse button and moving the mouse will pan the model 500 on the screen. Finally, the left mouse button is used to screen various tools and objects on the screen.

To start the lining of the margin 501, the user may zoom in on the margin 501 and rotate the model 500 so that the outline of the margin line can be easily seen. The user places the cursor on the point on the margin 501 and presses the left mouse button. This will place the first margin point. The program will then attempt to track the outline of the margin 501 as much as possible, based on the quality of the scanned image. The user then places additional points along margin 501 to complete the passage.

Once the margin 501 is closed, the user can move to an individual point. As shown in FIG. 5B, in one embodiment, when the point is selected, the cross-sectional window 505 opens to help the user confirm the proper placement of the point on the margin 501.

Referring to FIG. 5c, if a large section of margin 501 is to be relocated, a path change tool is provided to provide relocation. The user places the new point 502 on the last good point of the current margin 501 and then places the new point 503 as needed. The path modified path is terminated on the current point of the current margin 501.

In one embodiment, a smoothing tool is provided for overall relaxation and smoothing of leading edge margins.

In some cases, the scanned image may contain artifacts that do not belong to the model. These artefacts can arise from saliva, excess powder, or bubbles of other materials that were present on the patient's teeth during the injection procedure. These artifacts can be removed using the bubble tool provided in the program. To invoke the bubble tool, the user clicks on the bubble tool icon, which causes the indicator ( e.g., colored circle) to appear on the portion of the model 500. The user then places the indicator on the artifact and presses the left mouse button. The size of the affected area can be changed by clicking on the edit influence button and then moving the mouse while holding down the left button. The affected zone will be indicated by the size of the indicator displayed on the model.

When the complete margin line 501 of the preparation tooth 504 is completed, it will be visually represented on the model 500 as shown, for example, in Figure 5d. At this point, the user can begin designing the restoration. In the embodiments described herein, the restoration is designed by taking into account the position of the teeth within the arch shape, as described below.

Distance to the opponent's teeth

The optimal distance between the occlusal surface of the prepared tooth and the occlusal surface of the opposing dentition is established as part of the restoration design to ensure the optimal thickness for the restoration. Distance requirements may depend on factors such as selected materials for restorative design, the amount of space the adhesive will need to adhere to the restorative tube, as well as patient and physician preference. For example, some dental restorative materials have a greater minimum thickness requirement in finished restoration than other materials, and for this reason, a greater distance is required between the prepared tooth and the opposing dentition.

Referring to Figures 6a, 6b and 6c, a method is provided for determining whether a minimum distance parameter has been achieved between a prepared tooth 603 and a mating tooth 608. [ After the margin line 601 is identified, the offset surface component 602 is calculated from the prepared tooth 603 of the scanned model 600. In one embodiment, as seen in the example of FIG. 6b, the cross-sectional representation of the offset surface component 602 corresponds roughly to the size and / or shape of the tooth restoration design, e. The inner surface of the dental restoration is sufficiently larger than the prepared tooth, for example, to provide a space or offset 604 approximately equal to the thickness of the adhesive or adhesive material disposed between the prepared tooth and the tooth restoration. In addition, the facet of the dental restoration may be larger than the prepared tooth to provide compensation for a minimum puncturer radius greater than the radius of the tooth 607 of the prepared tooth. The size of the offset surface component 602 is greater than the prepared tooth 603 in an amount approximately equivalent to the adhesive or adherent material offset 604 that may be required to attach the dental restoration to the prepared tooth 603 and for the minimum puncturer radius compensation 606. [

The upper arch 701 and the lower arch 702 of the scanned model 700 are evaluated in the occlusal state as shown in Figures 7a and 7b to determine a sufficient amount of distance between the offset surface components 603, 703 and the surface of the mating tooth 704. The nearest point (s) 605 between the offset surface component and the opposing dentition is evaluated to determine if the distance parameter of the given material is matched. In one embodiment, a point 705 that does not meet the distance requirement is identified and optionally selectively labeled. In one embodiment, points for which distance requirements are not met between the prepared teeth and the mating teeth can be visualized as spots 705 on the output device, as seen in FIGS. 7a and 7b.

In some embodiments in which the established distance parameter between the prepared tooth and the opposing dentition is not met, the distance may be increased by replacing the restorative material, deforming the opposing dentition, or deforming the prepared tooth. A method is provided in which, upon failure of a first minimum distance parameter, a proposal for a replacement material having a different thickness requirement can be calculated. The thickness parameter of the replacement material can be evaluated to determine if the minimum distance requirement meets the replacement of one material with another.

In a further embodiment, the distance requirement can be achieved by reducing the area of the opponent's teeth. A reduction proposal for reducing the opposing dentition can be calculated. The spot or area may be located on the opponent's teeth, and the reduction area may be labeled for visualization. This information may be communicated to the patient's physician for the determination of whether the opponent's dentition can be reduced, such as suggested by grinding, so that the minimum thickness requirements can be met.

In some embodiments, it may be desirable to reduce the portion of the prepared tooth to meet the distance parameter. Thus, a proposal for reducing the prepared tooth can be calculated. In one embodiment, a position for reducing the prepared tooth to meet the minimum distance requirement is identified on the scanned model, optionally labeled as a spot, for example, and the dentist As shown in FIG.

In a further embodiment, with respect to Figures 8a, 8b, and 8c, a CAD process may also be performed to calculate the reduced coping model 801 on the scanned model 800 of the patient's dentition. The reduced coping model 801 exhibits a protruding area 803 of the prepared tooth 802 that is reduced to achieve the minimum distance requirement. In one embodiment, a hypothetical reduced coping model 801 is formed by a CAD process, and a physical reduction coping can be computed from it by a CAM process, e.g., three-dimensional printing or milling. The reduced coping formed by the CAD and CAM process is fit onto the prepared tooth 802 and includes the space 804 to project the area of the prepared tooth to be reduced. When placed on the patient's actual dentition, the reduction coping 801 can be used as a sidewall to reduce only the amount of the preparation tooth 802 protruding through the space 804, as needed to achieve the minimum distance requirement of the dental restoration. For example, as seen in Figures 8b and 8c, the projecting area is reduced to the height of the reduction coping 801. [ Advantageously, the reduced coping produced by the CAD and CAM processes can be formed without the preparation of the patient ' s physical model.

Arch-shaped arrangement

Referring now to Figures 5d and 9a-9d, after the margin lines 501 and 909 have been identified on the model 500, the design program has determined that for the library tooth 901 that best matches the adjacent teeth of the prepared tooth 907 in the scanned model 908, The library 900 is searched and, as discussed below, will naturally locate it, taking into account the natural structure of the arch 906 where the tooth 901 is located. The tooth library 901 includes individual tooth shapes, and each tooth has several landmarks and orientations. As shown in Figures 9a and 9b, each tooth 901 has an indicated occlusal direction 902, a buccal direction 903, an indicated upper portion 904, and a separator line 905 that divides tooth 901 between its root and its root. In one embodiment, with reference to Figure 9a, the library teeth have an initial alignment in the form of a library arch corresponding to the anatomical bending of the teeth in the mouth, and provide an overall library arch shape or curvature. In one embodiment, the library teeth are aligned in a library arch shape having an overall shape corresponding to an ideal arch arch deformity.

In one embodiment, the arrangement of library arch shape 906 described above includes at least the following four steps:

An initial placement of the library arch shape 906 based on the prepared tooth position, buccal direction 903, and occlusal direction 902;

Fit library arch shape 906 for injection;

Improvement of individual tooth position of library teeth compared to injection; And

Location interpolation of library teeth for all preparations using neighbors.

Each of these steps is described in more detail below.

Early placement of arches

Referring to Figures 9c and 9d, the first step involved in the placement of the library arch configuration 906 is the initial placement of the library arch 906 based on the position of the preparation tooth 907, the buccal direction 903, and the occlusal direction 902. [ The initial alignment of the library tooth with the injection is based on the following criteria:

Tooth number of prepared tooth 907;

The occlusal direction of the scan;

The buccal / facial direction of the prepared tooth 907; And

Occlusion and buccal / facial orientation of the library tooth 901.

The center of the margin line 909 on the model / scan 908 is aligned at the center of the selected library tooth 901, with both pairs of orientations defined by the orientation of the tooth library 900.

A library tooth that is not present in the scan (not labeled in the tooth chart, or labeled as "lacking in gap") is excluded from the next step. In addition, if there are some teeth labeled "missing without a gap ", these teeth are removed from the library arch shape 906, and the library arch shape is tightly compressed to close any gaps.

If the model / scan data 500 has more than one provision, only one of the supplies will be used for the initial placement. If both jaws have a preparation, each jaw is placed independently based on its provision as defined for the jaw.

Arch is suitable for injection

Then, as shown in FIG. 9d, in some embodiments, after the initial placement of the arch 906, the tooth restoration program is used to try to find a better position for the arch 906, using the following criteria:

Inner movement (5 steps, 0.5 mm per move);

Uniform scale (relative to the prepline center) (0.92 ... 1.08);

Buccal translocation (5 steps, 0.5 mm per step); And

Rotate around the axis of the occlusion with the center of rotation at the center of the prepress (three steps of 2.5 degrees per step).

At all iterations, the arch shape 906 is moved to one of four directions, and the snapping quality (defined below) is calculated for each move. After all iterations, the position with the highest snapping quality is the result of this step.

As defined herein, the "snapping quality" for an arch is based on the average distance from the tooth surface point to the scan surface in the tooth library; The smaller the average distance, the greater the snapping quality.

Improvement of individual tooth position

In some embodiments, for example, various attempts are made to align each tooth (e.g., 1001 and 1002) to scan 1000, as shown in FIG. In some embodiments, portions of the library arch shape corresponding to the injected model of the patient's teeth can be separated or segmented from the remainder of the library arch shape for further modification of the library arch shape and library teeth.

The tooth restoration program finds the highest tooth position in 7 dimensions (3 movements, 3 rotations, + 1 scale). Specifically, all teeth included in the scan optimize their position using the following seven norms:

Buccal translocation,

Occlusal movement,

Medial-distal movement,

Torque angle,

The tip angle,

Rotation angle, and

Scale

At each optimization step, the teeth were implanted in all directions (+/- 1 mm buccal, +/- 1 mm occlusion, +/- 1 mm medial-distal translation, +/- 1 degree torque angle, +/- 1 degree tip angle , +/- 1 degree rotation angle, and +/- 1% scale). Snapping quality is estimated every time. If no better position is found, the motion step is reduced by a factor of two until it reaches a prescribed epsilon value, which stops the repetition.

Location interpolation of library teeth for all preparations using neighbors

As shown in FIG. 11, since the restored tooth-preparation tooth 1104 - has nothing for snapping, its position is interpolated from its neighboring predetermined position and orientation. For example, if injection 1100 has successively two preparations (e.g., 1104 and 1105), all teeth have an interpolated deformation (position, orientation, and scale) with a larger weight of closer neighbors. For example, if preparations 1104 and 1105 have neighbors 1106 and 1107 with good snapping qualities, the library tooth for preparation 1104 will be interpolated from its position by 64% from tooth number 1106 and 33% from tooth number 1107.

If the preparation has only one neighbor with good snapping quality, the proposal for this provision will be centered on the margin line center and will only be oriented to the neighborhood.

After interpolation, all preparations are scaled and spatially adapted to block gaps with neighbors.

In one embodiment, the user can adjust the placement of the library arch shape in the event that the design layout of the library arch form does not cause optimal placement with respect to the patient ' s teeth. In one embodiment, the library tooth is associated with a virtual wire and is arranged on a virtual wire 1108, as seen in FIG. The user can manipulate the wire with the user input interface tool, for example by clicking on the point with the mouse, by grasping the wire point 1109 also associated with the wire. As the point moves, the wire moves to cause movement of the library teeth on the wire, and the user may attempt to improve the placement of the library arch shape relative to the scanned model. Thus, in one embodiment, the user manually adjusts the array of library teeth or the flexion of the library arch shape to more closely match the natural arch of the patient's dentition.

Automatic process for placement of library arches

In some embodiments, the automated computer-implemented process (s) in the form of a program, program or module that automatically executes one or more algorithms provides a computerized automated tooth restoration design proposal with minimal user interaction, RTI ID = 0.0 > optional < / RTI > opportunities for user input. With respect to the workflow outlined in FIG. 12, a computer implemented method 1200 for calculating a dental restoration design proposal includes automatic feature detection 1201 in an injected model, automatic arc fitting to a detected feature 1202, library arc type A process for automated rigor registration 1204 and / or non-rigor registration 1205 of the library arch and injected model, and a restoration design proposal 1206 process. A computer program or module that automatically evaluates success (1207 and 1208) of the library arch-type automatic strict registration 1204 and non-strict registration 1205 to the injected model and automatically provides input to the user if success is not achieved May optionally be included. In a further embodiment, any optional, computer-implemented procedure for scan segmentation may also be performed.

Peak detection

In one embodiment, the tooth restoration design proposal process includes a computer implemented process for initial placement of the library arch shape 906 on the scanned model, based on the correspondence of detected features of the scanned model and library arch shape. In one embodiment, the feature detection algorithm is implemented to automatically detect features that are present on a scanned model of a patient. One method involves detecting the peak located on the injected model of the patient ' s teeth. In one embodiment, the peak is detected in only a portion of the patient's teeth, for example, adjacent to, or nearest to, the prepared tooth. In one embodiment, the peak is detected in at least one adjacent tooth located on one side of the prepared tooth, and at least two adjacent teeth located on the other side of the prepared tooth.

For use herein, peaks 1301 and 1302 include occlusal or insulating bumps on the teeth, as depicted in Figures 13a-f. Generally, the canines, also referred to as canines 1303, each have a single peak, whereas small molars, also referred to as premolars 1304, typically have two or three peaks 1301 and 1302. Molar 1305 typically has four or five peaks.

One method for computer-implemented detection of the peak of a tooth includes an algorithm for locating the peak by calculating the flexural maximum within the scanned model. In this way, the occlusal curve of the tooth and occlusal surface 1306 can be identified by the detected peaks 1301 and 1302. In an alternative embodiment, an algorithm may be used for a computer-implemented method of detecting a peak, which calculates the height of the peak in the occlusal 1306 direction of the tooth. For the convenience of the user, the computer-detected peak is identified and the points 1301 and 1302, as seen in the representation of the injected model of the patient's mandible 1308 with the injected model 1300 and the prepared tooth 1309 of the patient's maxilla 1307, ≪ / RTI >

 A trait detection algorithm may be implemented that has a rule of limiting the density of points identified in the injected model or limiting the number of points identified in the area of the scanned model corresponding to the expected number of peaks. If the prepared tooth receives a tooth restoration and thus has been modified to remove or reduce the natural peak, a rule may be implemented to exclude the prepared tooth from the peak identification and labeling step.

In one embodiment, when reviewing the results of an automatic feature detection on a user output device 406, e.g., a monitor, the user can find the location of an anomaly point that was improperly identified as a peak by an algorithm. The user may execute the input interface to remove the anomalous points or stray points 1301 and 1302, or relocate the erroneous point over the peak visually identified by the user, or the point may be detected automatically or on an unidentified tooth peak Can be deployed.

Similarly, a set of peaks and / or occlusal surfaces for a library arch-shaped library tooth may be labeled and stored for later registration with an injected model.

Arc fit

In one embodiment, the arc is defined by computing the location of the feature identified on the injected model of the patient. The arc fits process can be used to fit the arc to the detected characteristic, e.g., the peak of the tooth. Figure 13b illustrates a buccal arc 1310 automatically computed from a buccally positioned peak 1301 that was automatically identified on the teeth of the patient's injected model by a computer implemented process. The arcs can be calculated and fitted in the injected model of the prepared tooth (shown), and optionally, in the injected model of the opposing dentition. 13b further illustrates the placement of the lingual arcs 1311 calculated from the lingual positioned peak 1302 identified in the injected model of the patient and adapted to the lingual peak. The buccal 1310 and lingual 1311 arcs provide information related to the general shape of the patient's anatomy that can be used to automatically register the library arch into the injected model and provide the information about the tooth's restoration Design proposals can be provided.

The method may also provide an option for the user to visualize the arrangement of the arcs on the output device 406, e.g., monitor. In one embodiment, an option for user input is provided via a user input interface to adjust the characteristics of the arc. In one embodiment, for example, where the user visually detects that the arc in the scanned model is too short or not well defined by the automatic process, the user may manually use an input device, e.g., a mouse or keyboard, The position, bend or length of the arc of the scanned model can be adjusted.

Similarly, buoyant arc 1312 and lingual arc 1313 for library arch shape 1314 are calculated based on buccal peak 1301 and lingual peak 1302 of library tooth 1315, and as shown in Figure 13c, It is suitable for peaks angled to the buccal and lingual sides. The arcs of the library teeth are stored as a set of data for use in registering the library arch shape in the patient's injected model.

Registration and library arch type scaling

Automatic registration into the library arch-shaped injected model may include both the severity 1204 and the non-strict 1205 registration process. The strict registration process involves registering the library arch shape and the scanned model, without changing the shape of the library arch shape. The non-strict registration process involves changing the shape of the library arch shape to optimize correspondence with the injected model. Both strict and non-strict enrollment processes can be acted automatically through the computer program module, without input from the user.

The strict registration procedure (flow chart in FIG. 12 at 1204) shows the library arch shape and the scanned model, by the correspondence of the data sets for each buccal and lingual arc, without changing the closure or position of the library teeth in library arch form And a step for automatic registration of the mobile terminal. With respect to Figures 13b and 13c, the library arch shape 1314 may, for example, overlap the buccal and lingual arcs 1313 and 1312 of the library arch shape or fit them to the buccal and lingual arcs 1310 and 1311 of the scanned model, Can be registered roughly in the scanned model by matching the points on the arc for registration without changing the overall shape of the library arch shape.

In one embodiment, the library arch shape registered in the scanned model may be scaled or scaled to approximately correspond to the size of the scanned model. Scale factor is calculated by calculating the average distance between the buccal and lingual arcs of the scanned model when measured at multiple points along the arc and similarly calculating the average distance between the buccal and lingual arcs of the library arch at multiple points ≪ / RTI > The library arch scaling factor is computed as:

S = d _s / d _l

Where d _l is the mean distance between the buccal 1312 and lingual 1313 arcs of the library arch shape, and d _s is the mean distance between the buccal and lingual arcs of the scanned model.

The buccal and lingual arcs 1312 and 1313 of the library arch shape correspond approximately to the arc dimensions of the injected model and are thus scaled or scaled to optimize the positioning of the library arch shape in the scanned model It can be deformed. Figures 13d and 13e illustrate a strict registration procedure involving automatic sorting of the library arch shape 1314 into the scanned model. Drawing 13e scales the library arch shape to the approximate size of the scanned model based on the average distance between each buccal and lingual arc to determine the correspondence of the lingual arc 1313 of the library arch shape 1314 and the lingual arc 1311 of the scanned model Provides an enlarged view of section 1316 illustrating one embodiment of the optimizing step. Gap 1317 between the injected model and the lining arc of the library arch shape, and / or the gap between the injected model and the buccal arc of the library arch shape is achieved by the complete alignment of the library arch shape and the scanned model by placement and sizing It can be indicated. In one embodiment, further modifications may be performed to optimize the correspondence.

The automatic, non-strict registration process (Figures 13f and 13g) can be applied after the initial alignment step to modify or twist the shape of the library arch shape to reduce the gap between the library arch shape and the arc of the scanned model . The non-strict registration 1205 procedure may consistently, globally and / or locally applying strain or warpage steps across the entire library arch shape. In one embodiment, the global distortion process alters the overall shape of the arch of the library arch shape to alter the library arch shape and the library arch shape to increase or establish correspondence between points on the arc of the scanned model . As seen in Figures 13f and 13g, the distance between the library arch shape and the lingual arc 1313 of the scanned model is reduced after the non-strict registration procedure is performed when compared to the distance between the arcs seen in Figures 13d and 13e.

The local deformation or distortion process step can be applied to portions of the library arch shape or to individual library teeth to snap the library teeth to the scanned model. As used herein, 'snapping' may be performed by establishing a snap tolerance level for correspondence between a library arch type and a scored model between a rare sample of points. The placement or shape of each library tooth may be modified separately to establish a greater correspondence between the corresponding teeth of the scanned model.

The automated process steps for determining the success of the strict and non-strict registration process can be performed as shown in the diagram of FIG. 12 at 1207 and 1208. An algorithm may be executed that indicates the level of correspondence needed to proceed to the next module in the automated restoration process illustrated in FIG. For example, the localized deformation process may further accomodate correspondence between the teeth of the library tooth 1314 and the injected model 1308, but may cause a lack of overall arch continuity, as seen in FIG. 14a. Reduced arch continuity can lead to loss of optimal tooth contact distance between teeth, as seen by space between teeth in FIG. 14a, or to missing missing model teeth.

If the corresponding threshold value is not achieved after non-strict registration between the library arch shape and the aligned points on the scanned model, then the strict registration process may be performed on the first set of corresponding values achieved from the first or initial global and / And can be automatically replayed. Thus, the strict registration and non-strict global and local deformation processes can be repeated to optimize the correspondence between the library arch shape and the points on the lingual and buccal arc of the scanned model. Multiple repetitions of the global and local deformation process may be performed automatically to refine the library arch shape-injected model registration to achieve optimal contact distance between teeth and final positioning of the arch shape, as seen in FIG. 14b .

Optionally, the automated registration process can be visualized on the monitor by the user. Where it is desirable for the user to assist the registration process manually, manual procedures for library arch layout can be performed as described herein. For example, when the automated library arch shape registration procedure 1204 fails to achieve an acceptable level of correspondence, a manual procedure 1209 for adapting the library arch shape to the scanned model may be performed using a criterion, such as described herein, Lt; / RTI > After the user input step of manually placing the library arch, the automated process for the non-strict registration process step can be resumed. Further, when the automated library non-rigor registration process 1205 fails to achieve optimal correspondence, a manual optimization process 1210 may be performed by the user to improve individual tooth positioning, in accordance with the optimization steps described herein .

After registration and optimization with a scanned model of the position of the library arch shape, a design restoration for the prepared tooth is proposed.

Restoration design

Based on the selection of the library teeth 901 within the context of the arch shape 906 described above, the dental restoration program will provide suggestions for restorations. This section describes the process for modifying the proposed restoration and for transferring the restoration design to a different processing location for shredding or manufacturing.

For example, in one embodiment, as shown in FIG. 15, the user can make a visual adjustment to the location before the library tooth 1501 is adapted to the die or to adjacent teeth within the arch shape 1506. No exact placement is required. Rather, the user provides general coverage so that the program can provide the best possible repair suggestion. Several manipulation tools are shown in the illustrated example in FIG. On each side of the library tooth 1501, below, and above, a sphere 1502 is used to rotate the tooth. Arrow 1503 is used to scale the teeth. Rod 1504 is used to transform the teeth. Each of these tools can be accessed by the user, for example, by using an indicator under the control of the mouse. After the user is satisfied with the overall rotation, size and position of the library tooth 1501, the program will suggest the restoration.

16 shows an initial restoration proposal 1601 within the arch shape 1606 provided by the dental restoration program. The user can control the visual quality of the restoration 1601 of the preparation jaw and the opposing jaw. Clicking on the tooth chart icon turns the visibility of these items on and off. Double clicking on a tooth chart will make the item translucent.

Restoration 1601 may or may not require further modification, as suggested. If this is the case, then it is desirable to first make a large change and then to finish with the automated touch edit feature (described below) and finally make the final adjustments. In one embodiment, the dental restorative design program includes a number of programming tools (e.g., freeform tools, smoothing tools, additional tools, removal tools, and motion / rotation / scaling tools) to make these large changes.

Big deformation

In one embodiment, the initial transformation is the closure and scaling of the restoration 1501 or 1601. If a change is needed, the user can use the move / rotate / scale tool. Sphere 1502 is used to rotate the restoration, arrow 1503 is used to scale the restoration, and rod 1504 is used to transform the restoration. (See FIG. 15).

The user can then review the buccal and lingual contours. Changes can be made in free form or in other tools. Peak placement can be checked with the visibility of the opponent's jaws turned on, and adjustments can be made in free form or with other tools.

In one embodiment, a color is used as an indicator on the image of the restoration 1501 or 1601 displayed on the monitor 406. For example, in one embodiment, if a contrasting collar is displayed on any portion of the restoration 1501 or 1601, this indicates that such an area should be thinner than the manufacturer's recommended minimum thickness for the restoration and should be calibrated. Additional, smoothed, or freeform tools can be used for this purpose.

In the illustrated embodiment, the freeform, smoothing, addition and removal tools each behave in a specific area of the restoration 1501 or 1601 indicated by the circle shown when clicking on the restoration 1501 or 1601. [ The magnitude of this influence can be changed to the Edit Influence tool displayed by the icon on the monitor 406. When the user clicks on the icon and the cursor is over the restoration 1501 or 1601, when clicking the left mouse button and moving the mouse up or down, it will resize the influence.

Editing contacts

Referring now to Figures 17a-17b, the dental restoration design program includes the Edit Contacts feature 1701 for automatically adjusting occlusion, medial and distal contacts. The program will initially suggest a predefined contact value that may be invalidated if desired. To adjust the occlusion, the user enters the desired contact value and presses the Fix Contacts button. The contact will be automatically adjusted to the assigned specification.

The medial and distal contacts are adjusted in a similar manner. The user turns on the inner / distal contact indicator by pressing the inner or distal button in the Edit Contacts window 1701. The medial and distal contacts can be adjusted together or separately. The user enters the desired contact value and presses the Fix Contacts button.

In one embodiment, the contact area 1802 can be overviewed by turning off the visibility of the preparation jaw, thus isolating the view of the restoration 1801, as shown in FIG.

In a further embodiment, a predefined contact value or range for tooth positioning is established, and a prompt, for example "pass" / "failure ", is calculated that the contact value of the design proposal falls within a pre- There is provided a process that can be displayed on the user output device to indicate whether or not the user is present. If it is determined that the calculated contact value is outside the predefined range of contact values, then a prompt, e.g., "narrow" or "open" indicates whether the proposed restored contact value is below or above a predefined contact value , It can be displayed automatically instead of displaying actual numerical values. In a further embodiment, evaluating the contact value of the proposed design proposal, calculating if the proposed design proposal is within the predefined contact value range, and adjusting the design proposal to achieve the contact value within the predefined range An automated procedure is provided for automatically adjusting the placement of the toothbrush tooth.

Placement of the milling sprue

Referring to FIG. 19, once the user is satisfied with the designed restoration 1901, the finished restoration 1901 is displayed to place the sprinkle sprue 1902. On the tooth canal restoration, the milling sprue 1902 will automatically be placed on the lingual surface in the largest airfoil portion of the restoration 1901. This is shown in FIG. This is typically the preferred location for the milling process. However, the user freely moves the sprue 1902 to another desired position as needed. In one embodiment, the restoration design program protects the margins and includes a limit that will not allow the user to place the sprue 1902 too close to the margin.

Transfer manufacturing files to machining center

Upon completion of the dental restoration design, instructions for manufacturing the dental restoration can be created from the design and transmitted to the processing machine. For example, in one embodiment, once the user is satisfied with the location of the sprue 1902, the user may instruct the dental restoration program to begin creating a manufacturing file 408 to provide instructions for branching or other processing mechanisms have. These instructions are then used as input to the restoration processing apparatus or method.

For example, as shown in FIG. 20, milling 2000 is adapted to machining the dental appliance based on the intermediate and final data set information received from the dental restoration design system 400. A simple rigid box structure supports the motion control mechanism, which includes a statically loaded linear Z-axis 2001 directly loaded to the structure, a dynamically loaded rotary B-axis 2002 carried by the linear stage, and a center B rotary axis It is composed of the A-axis rotary 2003, which is the statically loaded counterpart to be canceled. Spindle 2004 is also carried on a dynamically loaded rotary axis. Spindle 2004 can be converted to an axis for spindle rotation due to the motion of the linear Z-axis 2001. Statically loaded A-axis Rotary 2003 carries another rotary axis named "Indexer" 2005. The indexer 2005 supports the material being cut. Indexer 2005 allows access to the workpiece from multiple angles, and it can be an open or closed loop driven electrically or airborne and can be used for non-simultaneous positioning or complete simultaneous movement with other axes . This may also support other means of ultrasonically exciting the piezo electric actuator or workpiece. A suitable patient chair side milling machine is disclosed in co-pending U.S. Patent Application Serial No. 13 / 495,620, filed June 13, 2012, which is incorporated herein by reference in its entirety. The details of the milling machine and its use are described therein, and will not be reproduced herein.

In some embodiments, the quench 2000 is a quench next to the patient chair and can be easily accessible to a dentist or other user. In another embodiment utilizing a distributed environment, the milling 2000 or other processing machine may be located at a remote location and may be provided with data set information from the design system 400 via a network or other communication mechanism. The dentist or manufacturer selects the appropriate millable components and places them into the milling machine 2000. (See FIG. 20). After such installation, the milling machine, according to the manufacturing instructions delivered, mills the ingredients into a finished restoration that only needs to separate and grind or braze the mandrel.

Various alternatives, modifications, and equivalents may be used in place of the above components. Although the final position of the teeth may be determined using computer-assisted techniques, the user may move the teeth to their final position by independently manipulating one or more teeth while satisfying the constraints of the prescription.

Additionally, the techniques described herein may be implemented in hardware or software, or a combination of both. These techniques may be implemented in a processor, a processor-readable storage medium (including volatile and non-volatile memory and / or storage elements), and a computer program implemented in a programmable computer, each comprising a suitable input and output device. The program code is applied to the data entered using the input device to perform the functions described and to produce output information. The output information is applied to one or more output devices.

Each program can be run in a high-level procedural or object-oriented programming language that works with the computer system. However, these programs may be executed in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language.

Each such computer program is stored on a storage medium or device readable by a general or special purpose programmable computer for setting up and operating the computer when the storage medium or device is read by a computer to perform the described procedure ROM, hard disk, or magnetic disk). The system may also be implemented as a computer-readable storage medium configured with a computer program, wherein the storage medium thus configured causes the computer to operate in a specific, predefined manner. In some embodiments, the system is implemented in a "non-transitory" computer-readable storage medium, which is meant to be any or all computer-readable media, except for temporary, propagated signals.

The foregoing systems and methods have been described in terms of specific embodiments. Other embodiments are within the scope of the following claims. For example, tooth models can be posted on the Hypertext Transfer Protocol (http) website for limited access by the patient and the treatment clinician. As a further example, implementation of the described process may be distributed in various ways across a device, e.g., a scanning device (intra-premises or other) and / or a computer and / or processing facility and / or a dental lab and / Or all functionality may be integrated into a dedicated, stand-alone device. All such permutations and combinations are intended to be within the scope of the present invention.

In some embodiments, an automated computer-implemented process is provided wherein the identified module or step of the process described herein is remote or unknown to the user and performs a process or design step with minimal input or knowledge at the user's end This is done on a server that can do that. For example, in one embodiment of a cloud computing environment, the process described herein may be performed as a service rather than a product operated by the user, and software and information may be provided over the network. In one embodiment, for example, a patient record containing an injected model of a patient's dentition stored on a local computer in a dental lab or dental clinic is transmitted or provided via a network interface by a remote server, Lt; / RTI > In cloud computing environment computing, software storage, data access and record storage services can reside on a remote server, and the process can occur with minimal input on the user side. In one embodiment, the data file for the library arch shape, the library tooth, and the library tooth peak may be stored at a remote location from the user.

In one embodiment, obtaining an injected model of a patient from a first computer through a user interface; Performing at least one method step in a cloud computing environment selected from lining the margin of the prepared tooth, identifying the peak of the injected model, and fitting the buccal and lingual arcs to the peak of the injected model; And at least one method step selected from scaling factor calculations, scaling the library arch shape to approximately match the patient's dentition, and registering the buccal and lingual arcs of the scanned model and library arch shape, Performed in an environment; A computer implemented method is also provided that includes suggesting a restoration design. In other embodiments, information generated from the cloud computing process, such as a design proposal, may be sent to a user via a network interface to create a physical dental restoration placed in the patient ' s mouth, Can be transmitted in the second branch.

In a further embodiment, a virtual three-dimensional representation of the patient's dentition comprising a prepared tooth is obtained via a user interface; A computer-implemented method for designing a dental restoration, comprising forming a virtual dental restoration for a prepared tooth, wherein forming the restoration comprises lining the margin of the prepared tooth, Dimensional representation, fitting the buccal and lingual arcs to the peak of the patient's dentition, scaling a pair of buccal and lingual arcs in the form of a library arch to the corresponding arc of the patient's dentition, Registering a virtual three-dimensional representation and library arch shape, and proposing a restoration design, wherein at least one of the process steps of forming a virtual dental restoration is performed in a cloud computing environment.

Moreover, although the foregoing systems and methods have been illustrated and described with respect to one or more of these embodiments, those skilled in the art will readily appreciate that many modifications, additions and substitutions are possible, without departing from the spirit and scope of the following claims. ≪ / RTI > In addition, elements, such as processes, modules, programs, rules, steps, etc., may be implemented as separate components or in conjunction with other components, and for that reason belong to the scope and spirit of the principles of the present invention.

Claims (29)

A computer-implemented method of providing a dental restoration for a patient, the method comprising the steps of:
Providing a virtual three-dimensional representation of at least a portion of a patient's dentition comprising at least one prepared tooth;
Checking the preparation margin on a virtual three-dimensional representation;
Arranging the library arch shape of a virtual tooth library in an initial alignment with a virtual three-dimensional representation; And
We propose an initial restoration design based on the tooth design obtained from the virtual tooth library. The computer implemented method of claim 1, further comprising modifying an initial repair design to obtain a final repair design. The computer-implemented method of claim 2, further comprising: fabricating a final restoration using a final restoration design. The computer-implemented method of claim 1, further comprising fitting the library arch shape to a virtual three-dimensional representation. The method of claim 4, wherein adapting the library arch shape to a virtual three-dimensional representation includes shifting the library arch shape inward, uniformly scaling the library arch shape, moving the library arch shape to the narrow side, And rotating about the occlusal axis. ≪ Desc / Clms Page number 19 > 5. The method of claim 4, further comprising aligning the position of one or more individual teeth contained within the library arch shape with the position of the corresponding tooth or teeth contained within the virtual three-dimensional representation How the computer was run. 7. The method of claim 6, wherein aligning the position of the one or more individual teeth contained within the library arch shape comprises moving one or more individual teeth into the aperture, moving one or more individual teeth into the occlusion, Or by changing the torque angle of one or more individual teeth, by changing the tip angle of one or more individual teeth, by changing the angle of rotation of one or more individual teeth, Varying one or more individual teeth, or scaling one or more individual teeth. A non-transitory computer readable medium storing a program for causing a computer to perform a tooth restoration design process, the non-temporary computer readable medium comprising:
Providing a virtual three-dimensional representation of at least a portion of a patient's dentition comprising at least one prepared tooth;
Checking the preparation margin on a virtual three-dimensional representation;
Arranging the library arch shape of a virtual tooth library in an initial alignment with a virtual three-dimensional representation;
We propose an initial restoration design based on the tooth design obtained from the virtual tooth library. The computer implemented method of claim 8, further comprising modifying an initial repair design to obtain a final repair design. The computer-implemented method of claim 9, further comprising fabricating a final restoration using a final restoration design. 9. The computer-implemented method of claim 8, further comprising fitting the library arch shape to a virtual three-dimensional representation. 12. The method of claim 11, wherein adapting the library arch shape to a virtual three-dimensional representation includes moving the library arch shape inward, uniformly scaling the library arch shape, moving the library arch shape to the side, And rotating about the occlusal axis. ≪ Desc / Clms Page number 19 > 12. The method of claim 11 further comprising aligning the position of the one or more individual teeth contained within the library arch shape with the position of the corresponding tooth or teeth within the virtual three-dimensional representation How the computer was run. 14. The method of claim 13, wherein aligning the position of the one or more individual teeth contained within the library arch shape comprises moving one or more individual teeth in a narrow, moving one or more individual teeth into the occlusion, Or by changing the torque angle of one or more individual teeth, by changing the tip angle of one or more individual teeth, by changing the angle of rotation of one or more individual teeth, Varying one or more individual teeth, or scaling one or more individual teeth. A computer-implemented method of providing a dental restoration, the method comprising the steps of:
Obtaining at least a portion of a virtual three-dimensional representation of a patient's teeth comprising at least one prepared tooth;
Ascertaining the peak in a virtual three-dimensional representation of the patient's dentition;
Fit the first pair of arcs to the peak in the patient's dentition;
The library arch-shaped library provides a library arch shape that includes a second pair of arcs suitable for the peak of the tooth;
Arranging the library arch shape in an initial alignment having a virtual three-dimensional representation of the patient's teeth by aligning the first pair of arcs and the second pair of arcs; And
We propose an initial restoration design based on the tooth design obtained from the virtual tooth library. 16. The computer-implemented method of claim 15, wherein identifying the peak comprises identifying a peak on a portion of a patient's dentition closest to the prepared tooth. 16. The method of claim 15, wherein adapting the pair of arcs is accomplished by identifying the buccal peak on the patient's dentition, fitting the buccal arc to the buccal peak, identifying the lingual peak on the patient's dentition, Gt; and < RTI ID = 0.0 > a < / RTI > peak. 16. The computer-implemented method of claim 15, comprising scaling the second pair of arcs in the form of a library arch to approximately match the size of the first pair of arcs of the patient's dentition. 16. The method of claim 15, further comprising applying a global distortion process that alters the overall flexion of the library arch shape to establish a correspondence between the points in the second pair of arcs of the library arch type and the first pair of arcs of the patient's teeth ≪ / RTI > 16. The computer-implemented method of claim 15, comprising applying a local distortion process by snapping the individual library teeth of the library arch to the scanned model by establishing correspondence between points in the library arch shape and the scanned model. Gt; 16. The method of claim 15 wherein at least one of the steps of ascertaining the peak, fitting the first pair of arcs to the peak in the patient's dentition, and arranging the library arch shape in the initial alignment is automatically ≪ / RTI > 16. The system of claim 15, further comprising at least one selected from the group consisting of a library arc-shaped arc that is automatically executed by the computer system without input from a user, scaling an arc, applying a global distortion process, and applying a local distortion process. ≪ / RTI > further comprising the step of: 16. The computer-implemented method of claim 15, further comprising the step of determining if a minimum distance parameter is achieved from a virtual three-dimensional representation of the prepared tooth and the patient's dentition, 24. The computer-implemented method of claim 23, comprising providing an offset surface component for the tooth preparation, and measuring a distance between the offset surface component and the opposing dentition. 16. The computer-implemented method of claim 15, wherein one or more of the steps are performed in a cloud computing environment. CLAIMS What is claimed is: 1. A computer implemented method for providing tooth restoration comprising:
Acquiring, through the user interface, a virtual three-dimensional representation of the patient's dentition comprising the prepared tooth; And
Forming an initial tooth restoration proposal for a prepared tooth, comprising the steps of:
Preparation The lining of the margin of the tooth,
In order to identify the peak in the 3D representation of the patient's dentition,
The buccal and lingual arcs were adapted to the peak of the patient's dentition,
A library arch-shaped pair of buccal and lingual arcs was scaled to the corresponding arc of the patient's dentition,
Register a virtual three-dimensional representation of the patient's dentition and library arch shape, and
We propose a restoration design,
Wherein at least one of the steps of forming an initial tooth restoration proposal is performed in a cloud computing environment. A computer-implemented method for determining a minimum distance to a dental restoration, the method comprising the steps of:
Acquiring a virtual three-dimensional representation of the patient's dentition in an occlusal state comprising a preparation tooth and a portion of the opposing dentition;
Instead of the tooth preparation, forming an offset surface component of a virtual three-dimensional representation larger than the tooth preparation;
Obtaining a minimum distance parameter for the dental restoration;
Measuring a distance between the offset surface component and the opposing dentition, and comparing the distance to a minimum distance parameter; And determines if the minimum distance parameter is achieved. 27. The computer implemented method of claim 26, further comprising providing a proposal to achieve a minimum distance parameter for a dental restoration, if a minimum distance parameter is not achieved. 29. The computer-implemented method of claim 27, comprising providing a hypothetical reduction coping for reducing tooth preparation to achieve a minimum distance parameter.

Images